PDF malware analysis — malicious · a455ca633db7b831

MALICIOUS

PDF

22.6 KB Created: 2006-02-16 15:03:51 -08:00

MD5: 0f4be647b5443bd9090f8344dff0c027 SHA-1: 838780809417d76872ba28db12df44a2075837ad SHA-256: a455ca633db7b831d995b62886eaf43ed107e7227fa496df10054190b6b2b19e

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, which is flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier also strongly indicates maliciousness. The JavaScript stream, named javascript_obj0076_000.js, contains an eval() call, suggesting it's designed to execute obfuscated or dynamically generated code. This pattern is commonly used to download and execute further stages of malware.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `04fe8b5a2a23a83039f33a3de6d633fc918f978cf376ee445dac7267b91d2d19`	pdf-javascript-stream	PDF /JS object 76 at offset 0x589E	221 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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